The most difficult in any foreign language skills is writing, therefore, many students face difficulty in writing Arabic, that is why this research is aiming at improving writing skill by using flash cards. This research tried to correct the methodology of writing teaching and try to increase students’ competence in writing using flash cards. The problems of research is how to teach writing by using the flash cards and what is the effective aspect from this teaching by using this media for students of “Nurul Bayan Islamic boarding school”.

This research used experiment quantitative research, which is combination by experiment and control group. The sample research is student in class two senior high school. And total students are 34 people.

The result of this research is: at pre-test 52,94% students from control group and 58,70% students from experiment group was false or poor. 7,6% students from control group and 23,58% students from experiment group was average, 23,5%students from control group and 5,9% students from experiment group was good, and 5,9% students from control group was very good. The result from post-test is: 5,9% students from control group and 41,2% students from experiment was very good, 11,8% students from control group and 29,4% students from experiment group was good, 58,8% student from control group and 29,4% students from experiment group was average, and 23,5% students from control group was false or poor.

By seeing the writer’s competence and the limited time that writer have in doing research, it is not impossible will find many lacks, although the writer have given all competences to complete this research. Therefore, this research needs the repercussion and for who have opportunity for doing research about writing teaching and it is will be better if the reader continues and improves this research because the writing teaching is important things in communication.